Add CommitDecorator#author_link

app/decorators/commit_decorator.rb

@@ -42,6 +42,28 @@ class CommitDecorator < ApplicationDecorator
     end
   end
 
+  # Returns a link to the commit author. If the author has a matching user and
+  # is a member of the current @project it will link to the team member page.
+  # Otherwise it will link to the author email as specified in the commit.
+  #
+  # options:
+  #  avatar: true   will prepend avatar image
+  def author_link(options)
+    text = if options[:avatar]
+            avatar = h.image_tag h.gravatar_icon(author_email), class: "avatar", width: 16
+            "#{avatar} #{author_name}"
+          else
+            author_name
+          end
+    team_member = @project.try(:team_member_by_name_or_email, author_name, author_email)
+
+    if team_member.nil?
+      h.mail_to author_email, text.html_safe, class: "commit-author-link"
+    else
+      h.link_to text, h.project_team_member_path(@project, team_member), class: "commit-author-link"
+    end
+  end
+
   protected
 
   def no_commit_message